Explaining synthesis of three-phase sinusoidal voltages using SV-PWM in the first power electronics course

Mohan, Ned; Jose, P.; Brekken, Ted K. A.; Mohapatra, Kunjan Kumar; Sulkowski, Waldemar; Undeland, Tore

doi:10.1109/peew.2005.1567590

Cited by 9 publications

(3 citation statements)

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“…This soft switching approach is similar to a technique in electronic switch-mode converters that use small capacitors to temporarily absorb current when the transistors change state [6]. In an electronic system, soft switching is achieved by sizing components to induce large current ripples, which create temporary periods of reverse current.…”

Section: Introductionmentioning

confidence: 99%

Soft Switching Approach to Reducing Transition Losses in an On/Off Hydraulic Valve

Rannow¹,

2012

Journal of Dynamic Systems, Measurement, and Control

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A method for significantly reducing the losses associated with an on/off controlled hydraulic system is proposed. There has been a growing interest in the use of on/off valves to control hydraulic systems as a means of improving system efficiency. While on/off valves are efficient when they are fully open or fully closed, a significant amount of energy can be lost in throttling as the valve transitions between the two states when the switching times are not negligible. A soft switching approach is proposed as a method of eliminating the majority of these transition losses. The operating principle of soft switching is that fluid can temporarily flow through a check valve or into a small chamber while valve orifices are partially closed. The fluid can then flow out of the chamber once the valve has fully transitioned. Thus, fluid flows through the valve only when it is in its most efficient fully open state. A model of the system is derived and simulated, with results indicating that the soft switching approach can reduce transition and compressibility losses by 81% and total system losses by 64%. The soft switching approach has the potential to improve the efficiency of on/ off controlled systems and is particularly beneficial as switching frequencies are increased. The soft switching approach will also facilitate the use of slower on/off valves for effective on/off control; in simulation, a valve with soft switching matched the efficiency of an on/off valve that was 4.4 times faster.

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Section: Introductionmentioning

confidence: 99%

Soft Switching Approach to Reducing Transition Losses in an On/Off Hydraulic Valve

Rannow¹,

2012

Journal of Dynamic Systems, Measurement, and Control

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“…Full-bridge inverter is a basic circuit to study DC to AC conversions 5 . In this laboratory, a fullbridge inverter is controlled by a set of square wave inputs.…”

Section: Case Study III -Full-bridge Invertersmentioning

confidence: 99%

Pscad Simulation In A Power Electronics Application Course

Guo

Pecen²

2007 Annual Conference &Amp; Exposition Proceedings

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“…10 depicts the corresponding block diagram. A frequency domain approach is used for the design, which seeks to achieve zero steady state error to a step input and a phase margin of 60 ∘ ; the design approach and small signal transfer functions can be found in [7]. The small signal transfer function of the pulse-width modulator on the power electronics hardware platform is 0.556, and the gain of the feedback path is 𝑘 𝐹𝐵 = 0.2.…”

Section: Introductionmentioning

confidence: 99%

Board 89: Work in Progress: Use of Simscape in an Introductory Power Electronics Course

Mathews

2023 ASEE Annual Conference &Amp; Exposition Proceedings

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University of the Pacific was a member of an 82-university consortium led by the University of Minnesota (UMN) that was supported by a three-year Department of Energy grant to "revitalize electric power engineering education by state-of-the-art laboratories." Hardware developed at UMN served as the core of a new power electronics course developed in conjunction with this grant. UMN hardware labs were complemented using PSpice for circuit simulation. The PSpice exercises developed at UMN were built around PSpice 9.1 and required custom blocks to simulate components such as ideal transformers with variable turns ratios. Recent offerings of the power electronics course had difficulties with using PSpice for simulation such as: difficulty porting and accessing the PSpice 9.1 custom blocks in the Cadence PSpice software available on campus computers; IT issues resulting in frequent crashes of Cadence that left students with unreliable software access; inability of students to access Cadence remotely. Due to these challenges the author decided to work on replacing PSpice by Simscape for simulations in the Spring 2022 offering of Power Electronics. The transition required significant effort but was successful: all prior PSpice simulations were able to be implemented in Simscape. The paper presents simulation of a buck converter, the dynamic average model of a buck converter, and closed-loop voltage mode control of a buck converter using Simscape and contrasts the features of these simulations against PSpice-based simulations. While there is some published work on use of Simscape in power electronics, the present work relates to UMN labs available in the public domain and is thus of relevance to the 82 universities in the Department of Energy grant consortium.Formal assessment of the effectiveness of Simscape versus PSpice as a pedagogical tool in the context of an introductory power electronics course has not been performed yet. A survey on student preferences for Simscape versus PSpice for simulation showed a definite leaning towards Simscape, with ease of access to Matlab/Simscape software being a strong contributing factor.

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Explaining synthesis of three-phase sinusoidal voltages using SV-PWM in the first power electronics course

Cited by 9 publications

References 1 publication

Soft Switching Approach to Reducing Transition Losses in an On/Off Hydraulic Valve

Soft Switching Approach to Reducing Transition Losses in an On/Off Hydraulic Valve

Pscad Simulation In A Power Electronics Application Course

Board 89: Work in Progress: Use of Simscape in an Introductory Power Electronics Course

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